Emergency shield blocking and co-processing method and system for leakage of hazardous waste landfill

Abstract

The invention provides a dangerous waste landfill leakage emergency shield blocking and co-processing method and system, and relates to the technical field of underground pollution prevention and control and environment emergency treatment. On-site monitoring data are collected under the unified space-time reference, a pollution feather envelope line and shield curtain geometry are determined based on rapid inversion, a shield tunneling machine is driven to form a waterproof curtain, functional pipe pieces are arranged, an inward flow field is established in the curtain, and the water level difference and the negative pressure level are controlled in real time. The control terminal calculates a risk evaluation and dosage flow velocity instruction set according to the monitoring data and the extraction parameter set, and issues the risk evaluation and dosage flow velocity instruction set to the grouting, extraction and agent injection system to realize synchronous operation of curtain reinforcement and in-situ chemical repair; when the risk and repair indexes reach the standard, load reduction and plugging are carried out, and long-term monitoring is carried out. According to the method, rapid sealing control, dynamic repairing and intelligent decision making of the hazardous waste leakage area are achieved, and the accuracy of emergency disposal is improved.

Description

Technical Field

[0001] This invention relates to the field of underground pollution prevention and control and environmental emergency treatment technology, and in particular to a shield tunneling isolation and collaborative treatment method and system for emergency response to leakage from hazardous waste landfills. Background Technology

[0002] Leakage control at hazardous waste landfills still primarily relies on hydraulic control and physical barriers. Common practices include surface interception, extraction remediation, borehole curtains, and surface continuous walls, combined with a network of monitoring wells for discrete sampling and effectiveness evaluation. This system can be implemented on existing sites, but it often requires extensive excavation and high-density drilling, resulting in long construction periods and potential disturbance to existing seepage barriers. In sites with high aquifers, complex strata, or significant water level fluctuations, the uncertainty in identifying seepage channels and closing boundaries increases, making it difficult to guarantee the continuity of the curtain and the stability of the enclosure, and the permeability field is more prone to instability.

[0003] Underground engineering is developing towards less excavation, controlled tunneling, and mechatronics integration, with the adaptability of tunnel boring machines (TBMs) and pipe jacking technologies in environmental remediation continuously improving. The approach to remediation is shifting from single-point sealing to a holistic solution that combines isolation, flow control, and in-situ chemical reactions, incorporating multi-source online monitoring of electrical, temperature, and chemical indicators. By combining numerical inversion and digital twins, the determination of pollution plume boundaries, hydraulic gradients, and reaction residence times can be adjusted in real time, creating a stable inward flow field within the curtain, making the purification process more verifiable and traceable.

[0004] Many solutions still involve parallel processes rather than integrated designs, resulting in insufficient coordination between isolation, extraction, and in-situ reaction in terms of time and space. Monitoring data is mostly used for post-event assessment, making it difficult to directly drive online control of dosage, flow rate, and water level difference, which can easily lead to secondary migration or decreased reaction efficiency. There is still a lack of a systematic emergency approach that uses shield tunneling as a framework, combined with grouting reinforcement and precise chemical dosing, and is closed by multi-source monitoring and adaptive control, making it difficult to achieve rapid containment and quantifiable repair within a limited operational window. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, the purpose of this invention is to provide a shield tunneling containment and collaborative treatment method and system for emergency response to hazardous waste landfill leakage. By integrating shield tunneling, extraction and flow control, in-situ chemical remediation and intelligent feedback control into one system, it achieves rapid sealing and quantifiable remediation of hazardous waste landfill leakage, significantly improving the accuracy and reliability of emergency response.

[0006] To achieve the above objectives, the present invention provides the following solution: A shield tunneling and coordinated treatment method for emergency response to hazardous waste landfill leakage includes: Under a unified spatiotemporal reference, on-site monitoring data is acquired, and the pollution plume envelope and shield curtain geometry are determined based on rapid inversion. The curtain parameter set and operating boundary are obtained, and the curtain parameter set is transmitted to the shield machine and grouting system. The tunnel boring machine is driven to advance geometrically along the shield curtain and assemble segments to form a water-stop curtain. At the same time, functional segments with grouting holes and chemical injection holes are deployed to obtain the barrier entity, and the operating boundary is transferred to the extraction system. The extraction system is activated to form an inward flow field within the water-stop curtain, maintaining the target water level difference and negative pressure level, obtaining the extraction parameter set, and transmitting it to the control terminal along with the on-site monitoring data; The control terminal calculates the risk assessment and dose-flow rate command set based on the on-site monitoring data and the extraction parameter set, and sends them to the grouting system, extraction system and drug injection system respectively. The grouting system reinforces the curtain defects, and the agent injection system adds oxidizing or reducing agents in stages through the injection holes and operates synchronously with the extraction system to control the target reaction residence time, obtain repair progress assessment data, and transmit it back to the control terminal. When the risk assessment meets the threshold and the repair progress assessment data reaches the target, load reduction and blocking are implemented, and long-term monitoring is initiated; otherwise, the control terminal adaptively updates the dose-flow-rate instruction set and the extraction parameter set.

[0007] Preferably, the unified spatiotemporal reference includes a unified coordinate reference and a time synchronization reference; the field monitoring data includes water level, pore water pressure, oxidation-reduction potential, conductivity, temperature, and groundwater flow direction indication concentration; the sampling period of the field monitoring data is no more than ten minutes; the monitoring points of the field monitoring data are arranged in at least one ring along the inner and outer sides of the water-stop curtain, and the time synchronization error between the monitoring points and the control terminal is no more than one second.

[0008] Preferably, on-site monitoring data is acquired under a unified spatiotemporal reference, and the pollution plume envelope and shield curtain geometry are determined based on rapid inversion to obtain the curtain parameter set and operating boundary. The curtain parameter set is then transferred to the tunnel boring machine and grouting system, including: The field monitoring data is spatiotemporally aligned and quality controlled to remove missing data and outliers, and then resampled according to the unified spatiotemporal benchmark to form an inversion input set. Boundary and prior constraints are constructed based on the water level and temperature. The inversion grid size is determined to be 0.5 meters to 5 meters, the inversion time step is determined to be 0.1 to 1 day, and the initial values ​​of parameters and the range of constraint weights are set. Perform constrained resistivity inversion to output a primary solution for the subsurface electrical structure and anomaly range; Based on the first solution, heat transport inversion is performed to estimate the temperature field distribution and effective seepage direction, thus obtaining the second solution; A consistency evaluation is used to jointly fit the first solution and the second solution, and the planar morphology and longitudinal burial depth of the pollution plume envelope are output. The geometric fitting error is no greater than 1m. The convergence condition is that the residual change is lower than a preset threshold or the number of iterations reaches the upper limit. The geometry of the shield tunnel curtain is generated based on the pollution plume envelope, and the curtain parameter set is calculated; the curtain parameter set includes the plane orientation, longitudinal burial depth range, radius of curvature, and construction tolerance. The curtain parameter set is sent to the tunnel boring machine and the grouting system.

[0009] Preferably, each functional segment is provided with at least two grouting holes and two agent injection holes along the circumferential direction, and is provided with double water-stop strips around its perimeter and pre-embedded with pressure sensors and sampling ports; the sampling ports are connected to the data channel of the control terminal to obtain the sampling concentration and pressure response in the repair progress assessment data.

[0010] Preferably, the extraction system includes at least two extraction wells and a variable frequency pump set located within the water-stop curtain, maintaining a target water level difference of 0.5m to 3m and a negative pressure level of 5000Pa to 30000Pa; the extraction parameter set includes at least the wellhead flow rate, well bottom water level, negative pressure set value, and start / stop threshold.

[0011] Preferably, the reagent injection system has a segment length of 5m to 20m, and the injection flow rate and intermittent time are controlled according to the dosage and flow rate instruction set. The oxidizing agent is one or more of persulfate, hydrogen peroxide or ozone, and the reducing agent is one or more of ferrous salt or zero-valent iron. A buffer is added to control the pH during the reaction period at 4 to 8.

[0012] Preferably, the grouting system uses fine cement grout or water glass-based two-component grout, and the grouting pressure does not exceed the design pressure limit of the tunnel segment; the start-up conditions are determined by the control terminal and include any of the following situations: a) The leakage flow rate reaches the leakage flow rate activation threshold, which is the statistical upper limit of the baseline leakage flow rate or a preset value of not less than 0.5 L / min; b) The relative increase in the equivalent permeability coefficient reaches the equivalent permeability coefficient activation threshold, which is 1.3 to 3 times the baseline equivalent permeability coefficient; The termination condition is that all of the following conditions are met simultaneously: c) The curtain's permeability does not exceed the target permeability threshold, which is 1.0 × 10⁻⁶. -8 Up to 1.0×10 -7 m / s; d) The pressure recovery stability meets the pressure recovery stability criterion, which is that the absolute value of the pressure recovery rate at the monitoring point does not exceed 0.5 to 2000 Pa / h and lasts for 24 to 72 hours; The baseline is the continuous observation results from 24 to 72 hours before grouting.

[0013] Preferably, the control terminal calculates risk assessment and dose-flow rate command sets based on the on-site monitoring data and the extraction parameter set, and sends them to the grouting system, extraction system, and drug injection system respectively, including: The on-site monitoring data and the extracted parameter set are synchronized in time and anomalies are removed to form a state vector; Characteristic indicators are extracted based on the state vector, and a risk assessment is calculated; the characterization indicators include at least the plume envelope contraction rate, boundary flux, and toxicity equivalent concentration; the calculation formula for the risk assessment is: ;in, The dimensionless index of the aforementioned risk assessment; The first derivative of the area of ​​the plume envelope with respect to time represents the rate of contraction or expansion, expressed in square meters per day. The average rate of contraction during the baseline period; The baseline contraction rate standard deviation; The volumetric flux at the curtain boundary, in cubic meters per day; The baseline average boundary flux; The baseline boundary flux standard deviation; The toxicity equivalent concentration at the monitoring point is expressed in milligrams per liter. This represents the baseline average toxicity equivalent concentration. This represents the standard deviation of the baseline toxicity equivalent concentration. It is an S-shaped function used to map each standardized index to the interval between zero and one; the "baseline period" is the observation window of 24 to 72 hours before grouting or chemical injection; The closer it is to 1, the higher the risk. Under the constraints of the target water level difference and negative pressure level, the dose-flow rate instruction set is solved according to the target reaction residence time; the dose-flow rate instruction set includes segmented dosing flow rate, dosing concentration, pulse duration and interval time. System instructions are generated and distributed to the grouting system, extraction system, and reagent injection system respectively; the system instructions include start / stop criteria, set values, and fault switching strategies.

[0014] Preferably, the load reduction and sealing includes reducing the leachate infiltration load, performing secondary grouting at the boundary of the water-stop curtain to seal the grouting holes and the chemical injection holes, and switching the system to long-term monitoring; the long-term monitoring includes quarterly water level and water quality monitoring, and when the boundary flux and toxicity equivalent concentration are lower than the preset concentration threshold for two consecutive monitoring cycles, the system enters the maintenance operation state.

[0015] A shield tunneling containment and collaborative treatment system for emergency response to hazardous waste landfill leakage includes: The monitoring and modeling unit is used to acquire field monitoring data under a unified spatiotemporal reference, determine the pollution plume envelope and shield curtain geometry based on rapid inversion, obtain the curtain parameter set and operating boundary, and transmit the curtain parameter set to the shield machine and grouting system. The tunneling construction unit is used to drive the tunnel boring machine to advance geometrically along the shield curtain and assemble segments to form a water-stop curtain. At the same time, it lays out functional segments with grouting holes and chemical injection holes to obtain the barrier entity and transfers the operating boundary to the extraction system. The extraction flow control unit is used to start the extraction system to form an inward flow field within the water-stop curtain, maintain the target water level difference and negative pressure level, obtain the extraction parameter set, and transmit it to the control terminal along with the on-site monitoring data. The intelligent control unit is used by the control terminal to calculate the risk assessment and dose-flow rate instruction set based on the on-site monitoring data and the extraction parameter set, and to send them to the grouting system, extraction system and drug injection system respectively. The grouting and repair unit is used by the grouting system to reinforce curtain defects. The agent injection system adds oxidizing or reducing agents in stages through the injection holes and operates synchronously with the extraction system to control the target reaction residence time, obtain repair progress evaluation data, and transmit it back to the control terminal. The determination and update unit is used to implement load reduction and blocking and switch to long-term monitoring when the risk assessment meets the threshold and the repair progress assessment data reaches the target; otherwise, the control terminal adaptively updates the dose flow rate instruction set and the extraction parameter set.

[0016] The present invention discloses the following technical effects: This invention overcomes the problem of fragmented procedures in existing treatment methods by unifying barrier, flow control, and in-situ chemical reactions in time and space through a closed-loop process of "monitoring and modeling, tunneling construction, extraction and flow control, intelligent control, grouting and repair, and judgment and updating." Utilizing a unified spatiotemporal benchmark and rapid inversion, it accurately defines the pollution plume envelope and shield curtain geometry, reducing disturbances caused by blind excavation and high-density drilling, and achieving verifiable containment effects and quantifiable remediation paths with minimal construction impact.

[0017] This invention establishes a stable inward flow field within a water-stop curtain, using the target water level difference and negative pressure level as constraints, significantly reducing the risk of secondary migration in highly permeable media. Extracted parameter sets and field monitoring data are simultaneously sent to the control terminal, enabling real-time control of boundary flux and hydraulic gradient, addressing the difficulty of maintaining containment stability in existing methods. When seepage conditions fluctuate, wellhead flow rate and negative pressure settings can be adjusted immediately to maintain the continuity and safety of containment and purification.

[0018] This invention pre-installs grouting holes and reagent injection holes on the functional segments, and the grouting reinforcement and reagent addition and extraction processes are carried out simultaneously, improving the treatment effect from both the structural integrity and reaction efficiency perspectives. Grouting is used to eliminate local high-permeability channels in the curtain, while segmented reagent addition is used to improve the degradation rate and selectivity of pollutants. The two work synergistically under the same geometric reference, so that the curtain permeability and reaction residence time are both controlled, making up for the shortcomings of traditional solutions such as "incomplete sealing and weak reaction".

[0019] This invention uses risk assessment as a unified criterion, mapping envelope contraction rate, boundary flux, and toxicity equivalent concentration to dimensionless indicators. It automatically generates dose-flow-rate instruction sets and distributes them to each subsystem, forming a data-driven online decision-making process. Compared to post-assessment models, this mechanism can complete pre-scheduling before risks escalate, reducing reliance on manual intervention and subjective experience errors, and ensuring that start-stop criteria and setpoints are clear, traceable, and auditable.

[0020] This invention establishes clear conditions for entering long-term monitoring and maintenance strategies. Once the repair progress reaches the target, load reduction and sealing are implemented, smoothly transitioning the system from a high-intensity treatment phase to low-cost operation, reducing energy and reagent consumption, and ensuring long-term boundary stability. This phased strategy and parameterized thresholds can be directly embedded into operation and maintenance procedures, making it suitable for emergency and long-term remediation needs in high aquifers, complex strata, and fluctuating water levels, significantly improving the efficiency, reliability, and engineering adaptability of treatment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A flowchart of the method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the system structure provided in an embodiment of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The purpose of this invention is to provide a shield tunneling isolation and collaborative treatment method and system for emergency response to hazardous waste landfill leakage. It realizes integrated closed-loop control of shield tunneling, extraction and flow control and in-situ chemical remediation, and can quickly identify, accurately seal and stably purify the leakage area of ​​hazardous waste landfill under complex geological conditions.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 The method flowchart provided in the embodiments of the present invention is as follows: Figure 1 As shown, this invention provides a shield tunneling and coordinated treatment method for emergency response to leakage from hazardous waste landfills, comprising: Step 100: Acquire field monitoring data under a unified spatiotemporal reference, determine the pollution plume envelope and shield curtain geometry based on rapid inversion, obtain the curtain parameter set and operating boundary, and transfer the curtain parameter set to the shield machine and grouting system; Step 200: Drive the tunnel boring machine to advance geometrically along the shield curtain and assemble the segments to form a water-stop curtain. At the same time, deploy functional segments with grouting holes and chemical injection holes to obtain the barrier entity and transfer the operating boundary to the extraction system. Step 300: Start the extraction system to form an inward flow field within the water-stop curtain, maintain the target water level difference and negative pressure level, obtain the extraction parameter set, and transmit it to the control terminal along with the on-site monitoring data; Step 400: The control terminal calculates the risk assessment and dose-flow rate instruction set based on the on-site monitoring data and extraction parameter set, and sends them to the grouting system, extraction system and drug injection system respectively; Step 500: The grouting system reinforces the curtain defects. The chemical injection system adds oxidizing or reducing agents in stages through the injection holes and operates synchronously with the extraction system to control the target reaction residence time, obtain repair progress assessment data, and transmit it back to the control terminal. Step 600: When the risk assessment meets the threshold and the repair progress assessment data reaches the target, implement load reduction and blocking, and switch to long-term monitoring; otherwise, the control terminal will adaptively update the dose flow rate instruction set and extraction parameter set.

[0027] Specifically, in step 100 of this embodiment, the emergency site of a hazardous waste landfill leakage is taken as the research object, and this embodiment acts as the executing entity to carry out the entire process. First, this embodiment collects on-site monitoring data under a unified spatiotemporal reference. A unified spatiotemporal reference refers to ensuring consistency between the spatial location of the monitoring points and the sampling time through a unified coordinate system and time synchronization mechanism. The monitoring data includes water level, pore water pressure, oxidation-reduction potential, conductivity, temperature, and groundwater flow direction indicator concentration, with a sampling period of no more than 10 minutes. Monitoring points are arranged in a circle along both the inner and outer sides of the water-stop curtain, and the time error is kept to no more than 1 second through time synchronization equipment to ensure the spatiotemporal consistency of the data.

[0028] This embodiment performs spatiotemporal alignment and quality control on the collected data. If a single reading deviates from the median of similar data by more than three times the absolute deviation, it is considered an outlier and removed. When there are more than three consecutive missing measurements, a spatiotemporal weighted interpolation method is used to fill in the gaps. The cleaned data is resampled according to a unified spatiotemporal benchmark to form an inversion input set. This input set serves as the basis for the analysis of pollution plume and groundwater dynamic characteristics, providing reliable data support for subsequent geometric extrapolation.

[0029] This embodiment establishes boundary and prior constraints using quality-controlled water level and temperature data. Boundary constraints are used to determine the outer edge range and boundary conditions of the contamination plume, while prior constraints are used to limit the upper and lower limits of the electrical distribution and thermal conductivity parameters of the subsurface medium. The horizontal and vertical dimensions of the inversion grid range from 0.5 to 5 meters, the time step is from 0.1 to 1 day, and it is automatically adjusted according to the monitoring point density. Constrained resistivity inversion is used to identify the subsurface electrical structure and the distribution of high-permeability zones, while thermal transport inversion is used to calculate the temperature field and seepage direction.

[0030] This embodiment uses a consistency evaluation to jointly fit the results of resistivity inversion and thermal transport inversion. The consistency evaluation involves calculating the interpretation residuals of the two inversion results to the measured data within the same grid area, using the residual change rate and spatial overlap coefficient as convergence criteria. Convergence is considered achieved when the residual change rate is below 5% or the number of iterations reaches 50. If the conditions are not met, the grid is automatically expanded to 5 meters and the time step is shortened to 0.1 days until the criteria are met. The final output shows the planar morphology and longitudinal depth of the pollution plume envelope, with the geometric fitting error controlled within 1 meter.

[0031] This embodiment generates the shield tunneling curtain geometry and calculates the curtain parameter set based on the fitted pollution plume envelope. The curtain parameter set includes the plane orientation, longitudinal burial depth range, radius of curvature, and construction tolerance. Construction tolerance refers to the allowable deviation of the shield's advancement path from the design axis, not exceeding 2% of the curtain thickness and not exceeding 0.3 meters; the radius of curvature is not less than 30 meters to ensure the continuity of the tunneling trajectory and structural stability. The curtain parameter set is sent from the control terminal to the shield machine and grouting system, and a feedback verification mechanism ensures the correctness of the transmission. The above operations realize a closed-loop technology for the entire process of monitoring, inversion, geometry generation, and parameter transmission, providing accurate data for shield tunneling obstruction and subsequent repair.

[0032] Specifically, in step 200 of this embodiment, the tunnel lining is advanced geometrically along the generated shield curtain to complete the segment assembly, forming a water-stop curtain, while functional segments are installed. Functional segments refer to segments with added grouting holes and chemical injection holes on top of standard segments. Each segment has at least two grouting holes and two chemical injection holes circumferentially, with hole diameters ranging from 12 to 25 mm. The holes are arranged at equal angles to cover high-permeability channels in the gaps. Double water-stop strips are installed around the segments, and the compression deformation is controlled to 20%–40% of the design value. Pressure sensors and sampling ports are pre-embedded inside the segments. The pressure sensors have a range of at least 50,000 Pa and a resolution better than 100 Pa. The sampling ports use chemically resistant interfaces and are connected to sampling pipelines for subsequent collection of sampling concentration and pressure response data in the repair progress assessment.

[0033] In this embodiment, the operational boundary parameter set is sent to the extraction stage. The operational boundary parameter set refers to the set of parameters used to define the target hydraulic state within the curtain, and includes at least the target water level difference range, target negative pressure range, allowable fluctuation range, boundary exceedance alarm threshold, and sampling period. The target water level difference range is set to 0.5–3 m, with an allowable fluctuation range of ±0.1 m; the target negative pressure range is set to 5000–30000 Pa, with an allowable fluctuation range of ±500 Pa; the boundary exceedance alarm threshold is triggered when three consecutive samples exceed the allowable fluctuation range; the sampling period is 10 minutes. These parameters are written to the extraction controller via the control terminal and their consistency is verified by the calibration data from the pressure sensor and water level gauge. If the verification fails, the parameters are resent three times and recorded.

[0034] This embodiment sets up at least two extraction wells within the curtain wall and configures them with variable frequency pump sets to form an extraction system. The extraction parameter set includes at least the wellhead flow rate, bottom water level, negative pressure setpoint, and start / stop thresholds. The pump start threshold is triggered by multiple conditions, and the system starts when any one of the following conditions is met: First, the internal and external water level difference is below the lower limit of 0.5m for 30 minutes; second, the estimated boundary volume flux is above 0.02m³ / (m·d) for 30 minutes; third, the absolute value of the pressure drop rate displayed by the segment pressure sensor is greater than 200Pa / h for 1 hour. The pump stop threshold uses a combination of criteria: First, the internal and external water level difference is between 0.5 and 3m and remains stable for more than 24 hours, with the stability criterion being that the water level difference change does not exceed 0.05m / h; second, the wellhead negative pressure is between 5000 and 30000Pa and remains stable for more than 24 hours, with the stability criterion being that the negative pressure change does not exceed 100Pa / h; third, the wellhead flow rate change coefficient does not exceed 10% for 24 hours. The adjustment step of the extraction system is no more than 0.5 m³ / h for each flow rate and no more than 500 Pa for each negative pressure setting, in order to avoid excessive adjustment causing rearrangement of the seepage channels.

[0035] This embodiment sets safety and boundary violation handling thresholds to ensure the working status of the water-stop curtain and functional segments. When the leakage at the segment joint exceeds 0.5 L / min for 30 minutes, or when any pressure sensor reading exceeds 80% of the design pressure limit for 15 minutes, the system triggers grouting priority and limits extraction pressurization; when the target negative pressure exceeds 30,000 Pa or the absolute value of the instantaneous pressure drop rate at any well location exceeds 3,000 Pa / h, the system enters power reduction mode and issues an alarm; when the turbidity of the water sample at the sampling point increases by more than 50% relative to the baseline for 1 hour, it is considered an increase in the risk of particulate disturbance, and the system automatically reduces the pump speed and activates the fine particle interception device. All the above thresholds are derived from baseline observations 24–72 hours before the treatment is initiated. Specifically, in step 300 of this embodiment, after the shield curtain is constructed, the extraction system is activated to create a stable inward flow field inside the water-stop curtain, preventing the contamination plume from continuing to migrate outward. The extraction system in this embodiment consists of a variable frequency pump set and at least two extraction wells. The pump set automatically adjusts the flow rate and negative pressure according to the operating boundary parameters issued by the control terminal. During initial system startup, the negative pressure is gradually increased to bring the water level difference inside and outside the curtain to a set range of 0.5–3 m, and the negative pressure is maintained between 5,000 and 30,000 Pa. If the water level difference or negative pressure deviates from the target range by more than the set fluctuation range (±0.1 m or ±500 Pa), the system automatically fine-tunes the pump speed until equilibrium is restored. To ensure hydraulic stability, the system uses a 10-minute sampling cycle to monitor the wellhead water level and extraction flow rate, comparing each collected data with the previous cycle. If the data deviates from the range three times consecutively, an out-of-range alarm is triggered, and the system enters automatic correction mode.

[0036] This embodiment aggregates real-time operating data of the extraction system with on-site monitoring data to generate an extraction parameter set, which is then transmitted to the control terminal via a communication interface. The extraction parameter set includes wellhead flow rate, bottom water level, negative pressure setpoint, start / stop threshold, and system status indicators. The allowable variation coefficient of the wellhead flow rate does not exceed 10%, the deviation between the measured bottom water level and the reference water level does not exceed 0.05m, and the negative pressure deviation does not exceed 100Pa. If the above conditions are not met for three consecutive cycles, the system marks the current parameters as abnormal and triggers a correction command on the control terminal. The control terminal performs risk calculations and dynamic command adjustments based on this parameter set, achieving steady-state flow control within the water-stop curtain and real-time response to the external environment, effectively suppressing pollution migration and ensuring the integrity of the hydraulic barrier.

[0037] Specifically, in step 400 of this embodiment, after the control terminal completes data access, it first performs time alignment, anomaly removal, and consistency verification on the field monitoring data and the extracted parameter set to generate a state vector for decision-making. The data access thresholds are: time synchronization error no greater than 1 second, missing measurements no more than 3 sampling periods, and single-point deviation no more than three times the absolute deviation of similar data; records exceeding any of these thresholds are marked as anomalies and removed. The state vector is updated every 10 minutes, and a backoff strategy is triggered after three consecutive failed updates, maintaining the previous stable set value.

[0038] This embodiment calculates a risk assessment index and manages it in tiers, with a baseline window of 24–72 hours prior to intervention. Risk tiering thresholds are set to three levels: low risk (index less than 0.33), medium risk (index between 0.33 and 0.66), and high risk (index greater than 0.66). An instruction update is triggered when the index changes across levels and persists for more than 30 minutes; a rapid update is triggered when the index jumps to high risk and persists for more than 10 minutes. A lag strategy is used for the fallback threshold, requiring a continuous 60-minute interval within the adjacent lower-level range before downgrading, to avoid frequent oscillations.

[0039] This embodiment solves the dosage-flow-rate instruction set under the constraints of target water level difference and negative pressure level, and sets clear thresholds for different risk levels. The reagent segment length is 5-20m. The dosing flow rate is 0.05-1.00L / min per segment, the pulse duration is 10-60min, and the interval time is 20-120min. For low risk, a smaller flow rate and a longer interval are used; for medium risk, the flow rate is appropriately increased and the interval is shortened; for high risk, the flow rate is increased to no more than 90% of the upper limit of the segment and the interval time is shortened to no less than 20min. The target reaction residence time is 6-72h. If the residence time estimated from extraction and effective pore volume is less than 6h, the extraction flow rate is reduced first, and then the dosing pulse duty cycle is increased until it enters the 6-72h range.

[0040] This embodiment quantifies and limits the types of reagents and environmental constraints. The oxidizing agent can be any or any combination of persulfate, hydrogen peroxide, or ozone, with a concentration range of 1–20 g / L; the reducing agent can be ferrous salt or zero-valent iron, with a solution or slurry concentration of 0.5–10 g / L; the buffer is used to maintain the pH during the reaction period at 4–8. The environmental criterion is that the oxidation-reduction potential remains no lower than +200 mV during the oxidation phase and no higher than -100 mV during the reduction phase; if the pH exceeds the limits or the oxidation-reduction potential deviates from the target range by more than 50 mV for 10 minutes, the system automatically halves the dosage or pauses for one pulse cycle and issues an alarm. The maximum daily cumulative dose for a single segment is 0.5 times the equivalent liquid volume of the pore volume, and the maximum cumulative dose for three consecutive days is 1.5 times the pore volume; any upper limit triggering a forced interruption of no less than 12 hours.

[0041] This embodiment integrates grouting trigger and termination thresholds into a single instruction set for unified issuance. Grouting uses fine cement grout or water glass-based two-component grout, and the grouting pressure does not exceed the design pressure limit of the tunnel lining segments. The activation condition is that any of the following conditions are met: leakage flow rate is not less than 0.5 L / min or exceeds the baseline statistical upper limit, and the equivalent permeability coefficient increases by not less than 1.3 times relative to the baseline; the termination condition is that the curtain permeability is simultaneously at 1.0 × 10⁻⁶. -8 ~1.0×10 -7 Within the m / s range and stable, the absolute value of the pressure recovery rate at the monitoring point does not exceed 0.5–2000 Pa / h and lasts for 24–72 hours. If the risk assessment index is in the high-risk range and lasts for more than 30 minutes, and there is a sudden increase in the equivalent permeability coefficient, this embodiment increases the priority of grouting and imposes limits on extraction and reagent dosing.

[0042] This embodiment distributes generated system commands to the grouting system, extraction system, and reagent injection system, and sets linkage thresholds and rollback strategies for faults and boundary violations. Boundary violation thresholds include: water level difference deviating from the target range by more than ±0.1m for 30 minutes; negative pressure deviating from the target range by more than ±500Pa for 30 minutes; wellhead flow rate variation coefficient exceeding 10% for 24 hours; and any pressure sensor reading exceeding 80% of the design pressure limit for 15 minutes. When a boundary violation threshold is reached, extraction enters a power reduction mode, reagent injection enters a conservative mode, and grouting enters a verification mode. After the boundary violation is cleared and stabilized for 60 minutes, it resumes according to the predetermined priority. The command update cycle is no more than 30 minutes, with a 10-minute rapid update enabled in high-risk or boundary violation states.

[0043] In this embodiment, upon discovering localized high permeability or joint leakage in the curtain, reinforcement is first carried out by the grouting system, followed by segmented chemical injection. Reinforcement triggering and termination follow quantitative thresholds: grouting is initiated when the joint leakage exceeds 0.5 L / min for 30 minutes, or when the absolute value of the local pressure drop rate is greater than 200 Pa / h for 1 hour; the grouting pressure does not exceed the design pressure limit of the segment, and the cumulative grouting volume at a single point does not exceed 120% of the estimated void volume; termination is based on both conditions being met simultaneously: the curtain permeability is between 1.0 × 10⁻⁸ and 1.0 × 10⁻⁷ m / s and remains stable for 24–72 hours; the absolute value of the pressure rise rate at the monitoring point is between 0.5 and 2000 Pa / h and remains stable for 24–72 hours. To avoid erosion, a 2–6 hour waiting window is set in the same segment after grouting, during which chemical injection and large-scale extraction adjustments are suspended, with only maintenance extraction maintained.

[0044] Optionally, in step 500 of this embodiment, the reagent is added to the injection port of the functional tube segment in segments of 5-20m in length, and synchronized with the extraction system to meet the target reaction residence time of 6-72h. The oxidizing agent can be any or a combination of persulfate, hydrogen peroxide, or ozone; the reducing agent can be ferrous salt or zero-valent iron. The segmented addition flow rate is 0.05-1.00L / min, the pulse duration is 10-60min, and the interval is 20-120min. A buffer is used to control the pH during the reaction period at 4-8. The environmental control thresholds are: oxidation-reduction potential not lower than +200mV in the oxidation stage and not higher than -100mV in the reduction stage. If the pH at any monitoring point exceeds the limit or the oxidation-reduction potential deviates from the target range by more than 50mV for 10 minutes, the system automatically halves the addition flow rate for that segment or pauses for one pulse cycle, and restricts the extraction pressurization. If the residence time estimated based on extraction and effective pore volume is less than 6 hours, this embodiment prioritizes reducing the extraction flow rate (no more than 0.5 m³ / h per step, with a step size of 30 minutes), and shortening the interval if necessary. If the residence time exceeds 72 hours, the extraction flow rate is slightly increased or the interval is extended, provided that the water level difference is maintained at 0.5–3 m and the negative pressure is maintained at 5000–30000 Pa. The upper limit of the cumulative daily dose per segment is 0.5 times the pore volume, and the upper limit for three consecutive days is 1.5 times the pore volume. When either upper limit is reached, a mandatory interval of no less than 12 hours is required.

[0045] This embodiment uses a closed-loop transmission of remediation progress assessment data back to the control terminal. The assessment data includes envelope area, envelope shrinkage rate, boundary volume flux, toxicity equivalent concentration at the sampling port and monitoring wells within the loop, pH, redox potential, local pressure response, and leakage. The judgment and update thresholds are clearly defined as follows: the envelope area decreases by at least 20% from the baseline and remains so for 7 consecutive days; the boundary volume flux does not exceed 0.01 m³ / s. 3 / (m·d) and continuously maintained for 24–72 hours; the toxicity equivalent concentration of the monitoring well within the ring decreases by no less than 50% from the baseline and remains continuously for 72 hours; if any condition is not met or the risk index enters the high-risk range and lasts for 30 minutes, this embodiment will immediately issue a more conservative dose-flow rate instruction set and lower the extraction set value; if any safety threshold is triggered (target negative pressure exceeds 30,000 Pa, any pressure sensor reading exceeds 80% of the design pressure limit, water sample turbidity increases by more than 50% relative to the baseline and lasts for 1 hour), this embodiment will immediately enter the power reduction and conservative dosing mode and initiate on-site verification.

[0046] Preferably, the load reduction and sealing includes reducing the leachate infiltration load, performing secondary grouting at the boundary of the water-stop curtain to seal the grouting holes and the chemical injection holes, and switching the system to long-term monitoring; the long-term monitoring includes quarterly water level and water quality monitoring, and when the boundary flux and toxicity equivalent concentration are lower than the preset concentration threshold for two consecutive monitoring cycles, the system enters the maintenance operation state.

[0047] Specifically, in step 600 of this embodiment, the joint determination of risk assessment and repair progress is used as the basis for stage switching. The triggering conditions for entering the load reduction and sealing phases are that the following conditions are met simultaneously: the risk assessment index remains continuously <0.33 for ≥48 hours; the envelope area decreases by ≥30% relative to the baseline for ≥14 days; and the boundary volume flux is ≤0.01m³. 3 / (m·d) and continuously maintained for ≥72h; the toxic equivalent concentration of the monitoring well within the ring decreases by ≥50% from the baseline and is continuously maintained for ≥72h. If any of the above conditions are not met, it is determined that it is still in the treatment stage, and the dose flow rate instruction set and extraction parameter set are adaptively updated by the control terminal, with an update cycle of ≤30min, and a rapid update of 10min is adopted in the case of exceeding the limit or high risk.

[0048] This embodiment implements two types of measures after deloading and sealing. First, deloading: through reinforcement of the cover layer and optimization of drainage, the leachate infiltration load is reduced by ≥30% relative to the baseline before treatment, and verified by the leachate collection flow rate and the site infiltration coefficient, with allowable fluctuation ranges of ±10% and ±0.02, respectively. Second, sealing: secondary grouting is carried out at the boundary of the water-stop curtain to seal the grouting holes and chemical injection holes. The grouting pressure does not exceed the design pressure limit of the segment, and the cumulative grouting volume of a single hole does not exceed 120% of the estimated local void volume. The sealing verification adopts two criteria: pressure maintenance and leakage re-measurement. The pressure decay rate is ≤100Pa / h and lasts for ≥2h, and the joint leakage is ≤0.1L / min and lasts for ≥2h. The sealing is considered complete only when both criteria are met simultaneously.

[0049] This embodiment switches the system to long-term monitoring mode, with a monitoring cycle of quarters. Monitoring parameters include: water level, pore water pressure, boundary volume flux, toxicity equivalent concentration, pH, and redox potential. The threshold for entering a sustained operation state is: boundary volume flux ≤ 0.005 m³ / s for two consecutive quarters. 3 / (m·d); the toxic equivalent concentration is ≤ the preset concentration threshold for two consecutive quarters. The preset concentration threshold is determined by the lower of 120% of the background concentration and 50% of the applicable control limit. When multiple pollutants are present on site, the same threshold is applied after conversion by toxic equivalent, and the conversion factor and sampling analysis method are recorded in the monitoring report.

[0050] This embodiment sets the criteria and rhythm for maintenance and re-intervention. During maintenance operation, only low-load extraction and necessary environmental monitoring are maintained. If any of the following conditions occur in any quarter, maintenance will automatically cease and re-intervention assessment will begin: risk assessment index ≥ 0.33 for ≥ 30 minutes; boundary volume flux > 0.01 m³. 3 / (m·d) and lasting ≥24h; toxicity equivalent concentration exceeding the preset concentration threshold and lasting ≥24h; joint leakage >0.5L / min and lasting ≥30min. Re-intervention assessment is triggered by the control terminal, with the following priority order: restore extraction target setting, restore or strengthen the segmented addition of reagents, and start local reinforcement grouting.

[0051] Corresponding to the above methods, such as Figure 2 As shown, this embodiment also provides a shield tunneling containment and collaborative treatment system for emergency response to hazardous waste landfill leakage, including: The monitoring and modeling unit is used to acquire field monitoring data under a unified spatiotemporal reference, determine the pollution plume envelope and shield curtain geometry based on rapid inversion, obtain the curtain parameter set and operating boundary, and transmit the curtain parameter set to the shield machine and grouting system. The tunneling construction unit is used to drive the tunnel boring machine to advance geometrically along the shield curtain and assemble segments to form a water-stop curtain. At the same time, it lays out functional segments with grouting holes and chemical injection holes to obtain the barrier entity and transfers the operating boundary to the extraction system. The extraction flow control unit is used to start the extraction system to form an inward flow field within the water-stop curtain, maintain the target water level difference and negative pressure level, obtain the extraction parameter set, and transmit it to the control terminal along with the on-site monitoring data. The intelligent control unit is used by the control terminal to calculate the risk assessment and dose-flow rate instruction set based on the on-site monitoring data and the extraction parameter set, and to send them to the grouting system, extraction system and drug injection system respectively. The grouting and repair unit is used by the grouting system to reinforce curtain defects. The agent injection system adds oxidizing or reducing agents in stages through the injection holes and operates synchronously with the extraction system to control the target reaction residence time, obtain repair progress evaluation data, and transmit it back to the control terminal. The determination and update unit is used to implement load reduction and blocking and switch to long-term monitoring when the risk assessment meets the threshold and the repair progress assessment data reaches the target; otherwise, the control terminal adaptively updates the dose flow rate instruction set and the extraction parameter set.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0053] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A shield blocking and collaborative disposal method for emergency of hazardous waste landfill leakage, characterized in that, The method comprises the following steps: acquiring field monitoring data under a unified space-time reference, determining a pollution plume envelope and a shield curtain geometry based on rapid inversion, obtaining a curtain parameter set and an operation boundary, and transmitting the curtain parameter set to a shield machine and a grouting system; driving the shield machine to advance along the shield curtain geometry and assemble segments to form a waterproof curtain, while laying functional segments with grouting holes and reagent injection holes to obtain a barrier entity, and transmitting the operation boundary to an extraction system; starting the extraction system to form an inward flow field within the waterproof curtain, maintaining a target water level difference and a negative pressure level, obtaining an extraction parameter set, and transmitting the field monitoring data and the extraction parameter set to a control terminal together; the control terminal calculates a risk evaluation and a dose flow rate instruction set according to the field monitoring data and the extraction parameter set, and respectively sends them to the grouting system, the extraction system and the reagent injection system; the grouting system reinforces the curtain defects, the reagent injection system segmentally adds oxidizing reagents or reducing reagents through the injection holes, and synchronously operates with the extraction system to control the target reaction residence time, obtains repair progress evaluation data, and returns to the control terminal; when the risk evaluation meets the threshold and the repair progress evaluation data reaches the target, load reduction and plugging are implemented, and long-term monitoring is entered; otherwise, the dose flow rate instruction set and the extraction parameter set are adaptively updated by the control terminal.

2. The method of claim 1, wherein the method further comprises, The unified space-time reference comprises a unified coordinate reference and a time synchronization reference; the field monitoring data comprises water level, pore water pressure, oxidation-reduction potential, conductivity, temperature and groundwater flow direction indicating concentration; the sampling period of the field monitoring data is not higher than ten minutes; at least one circle of monitoring points is arranged along the inside and outside of the waterproof curtain, and the time synchronization error between the monitoring points and the control terminal is not greater than one second.

3. The hazardous waste landfill leakage emergency shield blocking and collaborative treatment method according to claim 2, characterized in that, The method comprises the following steps: spatially and temporally aligning and quality controlling the field monitoring data, removing missing and abnormal points, resampling according to the unified space-time reference to form an inversion input set; constructing boundary and prior constraints with the water level and the temperature, determining the inversion grid size as 0.5m to 5m, the inversion time step as 0.1d to 1d, and setting the parameter initial value and the constraint weight range; performing constrained resistivity inversion to output a first solution of underground electrical structure and abnormal body range; performing thermal transport inversion based on the first solution to estimate temperature field distribution and effective seepage direction, and obtaining a second solution; jointly fitting the first solution and the second solution by consistency evaluation to output the planar morphology and longitudinal burial depth of the pollution plume envelope, and the geometric fitting error is not greater than 1m; the convergence condition is that the residual change is lower than a preset threshold or the iteration number reaches an upper limit; generating the shield curtain geometry according to the pollution plume envelope, and calculating a curtain parameter set; the curtain parameter set comprises planar trend, longitudinal burial depth interval, curvature radius and construction tolerance. The curtain parameter set is sent to the shield machine and the grouting system.

4. The hazardous waste landfill leak emergency shield barrier and collaborative disposal method of claim 1, wherein, The functional segment is provided with at least two grouting holes and two medicament injection holes in each segment in the circumferential direction, double sealing strips are arranged on the periphery, and a pressure sensor and a sampling port are pre-embedded; the sampling port is connected with a data channel of the control terminal, and is used for obtaining sampling concentration and pressure response in the repair progress evaluation data.

5. The hazardous waste landfill leak emergency shield barrier and collaborative disposal method of claim 1, wherein, The extraction system includes at least two extraction wells in the waterproof curtain and a variable frequency pump set, a target water level difference is maintained at 0.5m to 3m, and a negative pressure level is maintained at 5000Pa to 30000Pa; the extraction parameter set at least includes wellhead flow, well bottom water level, negative pressure set value and start-stop threshold.

6. The hazardous waste landfill leak emergency shield barrier and collaborative disposal method of claim 1, wherein, The medicament injection system has a segmented length of 5m to 20m, and controls the dosage flow rate instruction set to control the dosage flow rate and the intermittent time; the oxidizing medicament is one or more of persulfate, hydrogen peroxide or ozone, the reducing medicament is one or more of ferrous salt or zero-valent iron, and a buffer is added to control the reaction period pH value to 4 to 8.

7. The hazardous waste landfill leak emergency shield barrier and collaborative disposal method of claim 1, wherein, The grouting system uses micro-cement slurry or water glass type double-liquid slurry, and the grouting pressure is not higher than the design pressure limit of the segment; the start condition is determined by the control terminal and includes any of the following cases: a) the leakage flow rate reaches a leakage flow rate start threshold, the leakage flow rate start threshold is a statistical upper limit of a baseline leakage flow rate or a preset value not less than 0.5L / min; b) the relative increase amplitude of the equivalent permeability coefficient reaches an equivalent permeability coefficient start threshold, the equivalent permeability coefficient start threshold is 1.3 to 3 times of the baseline equivalent permeability coefficient; The termination condition is met when the following conditions are met at the same time: c) the curtain permeability is not higher than a target permeability threshold, the target permeability threshold being 1.0 x 10 -8 m / s; and -7 m / s; and d) the pressure recovery stability meets a pressure recovery stability criterion, the pressure recovery stability criterion is that the absolute value of the pressure recovery rate of the monitoring point is not more than 0.5 to 2000Pa / h, and lasts for 24 to 72h; Wherein, the baseline is the continuous observation result within 24 to 72h before grouting.

8. The hazardous waste landfill leak emergency shield barrier and collaborative disposal method of claim 1, wherein, The control terminal calculates a risk evaluation and a dosage flow rate instruction set according to the field monitoring data and the extraction parameter set, and sends them to the grouting system, the extraction system and the medicament injection system respectively, including: Time synchronization and abnormality rejection are performed on the field monitoring data and the extraction parameter set to form a state vector; characterization indicators are extracted based on the state vector and a risk assessment is calculated; the characterization indicators at least include a pollution plume envelope shrinkage rate, a boundary flux and a toxic equivalent concentration; the calculation formula of the risk assessment is: ; wherein, is a dimensionless index of the risk assessment; is a first-order derivative of a pollution plume envelope area with respect to time, representing a shrinkage or expansion rate, with a unit of square meter per day; is an average shrinkage rate in a baseline period; is a standard deviation of the shrinkage rate in the baseline period; is a volume flux at a curtain boundary, with a unit of cubic meter per day; is an average boundary flux in the baseline period; is a standard deviation of the boundary flux in the baseline period; is a toxic equivalent concentration at a monitoring point, with a unit of milligram per liter; is an average toxic equivalent concentration in the baseline period; is a standard deviation of the toxic equivalent concentration in the baseline period; is an S-shaped function for mapping each standardized indicator to an interval of zero to one; the "baseline period" is an observation window of 24 to 72 hours before grouting or reagent addition; the closer to 1, the higher the risk; Under the constraint of the target water level difference and the negative pressure level, the dosage flow rate instruction set is solved according to the target reaction residence time; the dosage flow rate instruction set includes segmented dosage flow rate, dosage concentration, pulse length and intermittent time; System instructions are generated and sent to the grouting system, the extraction system and the medicament injection system respectively; the system instructions include start-stop criteria, set values and fault switching strategies.

9. The hazardous waste landfill leak emergency shield barrier and collaborative disposal method of claim 1, wherein, The load reduction and plugging include reducing the infiltration load of leachate, implementing secondary grouting to close the grouting holes and the medicament injection holes at the boundary of the waterproof curtain, and switching the system to long-term monitoring; the long-term monitoring includes quarterly water level and water quality monitoring, and when the boundary flux and the toxic equivalent concentration are lower than the preset concentration threshold for two consecutive monitoring periods, the system enters a maintenance state.

10. A shield barrier and collaborative disposal system for emergency of hazardous waste landfill leakage, characterized in that, It includes: A monitoring and modeling unit is configured to obtain field monitoring data under a unified space-time reference, determine a pollution plume envelope and a shield curtain geometry based on fast inversion, obtain a curtain parameter set and an operation boundary, and pass the curtain parameter set to a shield machine and a grouting system; A tunneling construction unit is configured to drive the shield machine to advance along the shield curtain geometry and assemble segments to form a waterproof curtain, while laying functional segments with grouting holes and reagent injection holes to obtain a barrier entity, and pass the operation boundary to an extraction system; An extraction and flow control unit is configured to start the extraction system to form an inward flow field in the waterproof curtain, maintain a target water level difference and a negative pressure level, obtain an extraction parameter set, and pass the extraction parameter set and the field monitoring data to a control terminal; An intelligent control unit is configured to calculate a risk evaluation and a dose flow rate instruction set based on the field monitoring data and the extraction parameter set, and send the dose flow rate instruction set to the grouting system, the extraction system, and a reagent injection system, respectively; A grouting and repair unit is configured to implement reinforcement of curtain defects by the grouting system, and to segmentally inject oxidizing reagents or reducing reagents through the injection holes by the reagent injection system, and to operate synchronously with the extraction system to control a target reaction residence time, obtain repair progress evaluation data, and return to the control terminal; A determination and update unit is configured to implement load reduction and plugging when the risk evaluation meets a threshold and the repair progress evaluation data reaches a target, and to enter long-term monitoring; otherwise, the dose flow rate instruction set and the extraction parameter set are adaptively updated by the control terminal.

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